\documentclass{article}
\usepackage{amssymb,amsmath,amscd,concmath}
\pagestyle{empty}
\begin{document}
\begin{equation*}Arcrin=c \approx \pi a \left[ 3 (1+\sqrt{1-e^2}) - \sqrt{(3+ \sqrt{1-e^2})(1+3 \sqrt{1-e^2})} \right] \!\,F(\theta, m) and E(\theta, m)\end{equation*}
\end{document}
